AC_INIT([libndpi], [@NDPI_VERSION_SHORT@])

AC_CONFIG_MACRO_DIR([m4])

AM_INIT_AUTOMAKE([foreign subdir-objects])

AC_ARG_WITH(llvm_sanitizer,     [  --with-llvm-sanitizer   Build with support for the LLVM address sanitizer])

AS_IF([test "${with_llvm_sanitizer+set}" = set],[
     CFLAGS="${CFLAGS} -g -O2 -Wno-unused-value -fsanitize=address -fno-omit-frame-pointer"
     LDFLAGS="${LDFLAGS} -fsanitize=address"
     CC=clang
     CXX=clang++
])

LT_INIT

AC_PROG_CC
AM_PROG_CC_C_O
AC_PROG_CXX
AC_PROG_CC_STDC
AC_LANG_WERROR
AX_PTHREAD

NDPI_VERSION_SHORT="@NDPI_VERSION_SHORT@"
NDPI_MAJOR="@NDPI_MAJOR@"
NDPI_MINOR="@NDPI_MINOR@"
NDPI_PATCH="@NDPI_PATCH@"

AC_DEFINE_UNQUOTED(NDPI_MAJOR_RELEASE, "${NDPI_MAJOR}", [nDPI major release])
AC_DEFINE_UNQUOTED(NDPI_MINOR_RELEASE, "${NDPI_MINOR}", [nDPI minor release])
AC_DEFINE_UNQUOTED(NDPI_PATCH_LEVEL,   "${NDPI_PATCH}", [nDPI patch level])

if test -d ".git"; then :
     GIT_TAG=`git log -1 --format=%h`
     GIT_DATE=`git log -1 --format=%cd`
     #
     # On CentOS 6 `git rev-list HEAD --count` does not work
     # 
     #
     GIT_NUM=`git log --pretty=oneline | wc -l | tr -d '[[:space:]]'`
     GIT_RELEASE="${PACKAGE_VERSION}-${GIT_NUM}-${GIT_TAG}"
else
     GIT_RELEASE="${PACKAGE_VERSION}"
     GIT_DATE=`date -u -r CHANGELOG.md`
fi

AC_DEFINE_UNQUOTED(NDPI_GIT_RELEASE, "${GIT_RELEASE}", [GIT Release])
AC_DEFINE_UNQUOTED(NDPI_GIT_DATE, "${GIT_DATE}", [Last GIT change])

AC_CHECK_HEADERS([netinet/in.h stdint.h stdlib.h string.h unistd.h])

ADDITIONAL_LIBS=
PCAP_HOME=$HOME/PF_RING/userland

DPDK_TARGET=
if test -d $HOME/DPDK; then :
     echo "Enabling DPDK support in ndpiReader"
     DPDK_TARGET=dpdk
else
    echo  "DPDK support disabled (missing $HOME/DPDK)"
fi

if test -d $PCAP_HOME; then :
     echo -n ""
else
     PCAP_HOME=`pwd`/../../PF_RING/userland
fi
SHORT_MACHINE=`uname -m | cut -b1-3`
if test $SHORT_MACHINE = "arm"; then
     LIBNUMA=""
else
     AC_CHECK_LIB([numa], [numa_available], [LIBNUMA="-lnuma"])
fi

MACHINE=`uname -m`
SYSTEM=`uname -s`
if test $SYSTEM = "Darwin"; then
 CC=clang
fi

CUSTOM_NDPI=

if test -d ../nDPI-custom; then :
   CUSTOM_NDPI="-DCUSTOM_NDPI_PROTOCOLS"
   AC_MSG_RESULT([Compiling with custom nDPI protocols])
fi

AC_ARG_WITH(hyperscan,          [  --with-hyperscan        Enable nDPI build with Intel Hyperscan])

AS_IF([test "${with_hyperscan+set}" = set],[
     BKP=$LIBS
     LIBS="$LIBS -lstdc++ -lm"
     AC_CHECK_LIB([hs], [hs_compile_multi], AC_DEFINE_UNQUOTED(HAVE_HYPERSCAN, 1, [Intel Hyperscan is present]))
     LIBS=$BKP

     AS_IF([test "x$ac_cv_lib_hs_hs_compile_multi" = xyes],[
          AC_CHECK_LIB([m], [pow])
          AC_CHECK_LIB([stdc++], [main])
          PKG_CHECK_MODULES([HS],[libhs])
          LDFLAGS="$LDFLAGS $HS_LIBS"
	  AC_MSG_RESULT([compiling with Intel Hyperscan])
     ],[
          AC_MSG_RESULT([Intel Hyperscan not found, exiting. See https://github.com/intel/hyperscan/blob/master/doc/dev-reference/getting_started.rst for install/build instructions])
          exit 1
     ])
])

case "$host" in
   *-*-mingw32*|*-*-msys)
      CFLAGS="${CFLAGS} -DOS_WIN32"
      LDFLAGS="${LDFLAGS} -lws2_32 -lucrtbase"
      ;;
   *)
      if test -f $PCAP_HOME/libpcap/libpcap.a; then :
         echo "Using libpcap from $PCAP_HOME"
         PCAP_INC="-I $PCAP_HOME/libpcap"
         PCAP_LIB="$PCAP_HOME/libpcap/libpcap.a $PCAP_HOME/lib/libpfring.a $LIBNUMA `$PCAP_HOME/lib/pfring_config --libs`"
	 AC_CHECK_LIB([rt], [clock_gettime],   [PCAP_LIB="$PCAP_LIB -lrt"])
         AC_CHECK_LIB([nl], [nl_handle_alloc], [PCAP_LIB="$PCAP_LIB -lnl"])
         # The dlopen() function is in libdl on GLIBC-based systems
         # and in the C library for *BSD systems
         AC_CHECK_LIB([dl], [dlopen, dlsym],   [DL_LIB="-ldl"],[AC_CHECK_LIB([c], [dlopen, dlsym], [DL_LIB="-lc"],[AC_MSG_ERROR([unable to find the dlopen(), dlsym() functions]) ]) ])
      else
         AC_CHECK_LIB([pcap], [pcap_open_live], [PCAP_LIB="-lpcap"])
	 if test $ac_cv_lib_pcap_pcap_open_live = "no"; then :
            echo ""
            echo "ERROR: Missing libpcap(-dev) library required to compile the example application"
            echo "ERROR: Please install it and try again"
            exit
	 fi
      fi
      ;;
esac

AC_ARG_ENABLE([debug-messages],
    AS_HELP_STRING([--enable-debug-messages], [Define NDPI_ENABLE_DEBUG_MESSAGES=1]), [
	AC_DEFINE(NDPI_ENABLE_DEBUG_MESSAGES, 1, [Enable ndpi_debug_messages]) ])

AC_ARG_ENABLE(fuzztargets,
    AS_HELP_STRING([--enable-fuzztargets], [Enable fuzz targets]),[enable_fuzztargets=$enableval],[enable_fuzztargets=no])
AM_CONDITIONAL([BUILD_FUZZTARGETS], [test "x$enable_fuzztargets" = "xyes"])
AS_IF([test "x$enable_fuzztargets" = "xyes"], [
    AC_PROG_CXX
    AC_LANG_PUSH(C++)
    tmp_saved_flags=$[]_AC_LANG_PREFIX[]FLAGS
    AS_IF([test "x$LIB_FUZZING_ENGINE" = "x"], [
        LIB_FUZZING_ENGINE=-fsanitize=fuzzer
        AC_SUBST(LIB_FUZZING_ENGINE)
    ])
    _AC_LANG_PREFIX[]FLAGS="$[]_AC_LANG_PREFIX[]FLAGS $LIB_FUZZING_ENGINE"
    AC_MSG_CHECKING([whether $CXX accepts $LIB_FUZZING_ENGINE])
    AC_LINK_IFELSE([AC_LANG_SOURCE([[
#include <sys/types.h>
extern "C" int LLVMFuzzerTestOneInput(const unsigned char *Data, size_t Size);
extern "C" int LLVMFuzzerTestOneInput(const unsigned char *Data, size_t Size) {
(void)Data;
(void)Size;
return 0;
}
        ]])],
        [ AC_MSG_RESULT(yes)
          has_sanitizefuzzer=yes],
        [ AC_MSG_RESULT(no) ]
    )
    _AC_LANG_PREFIX[]FLAGS=$tmp_saved_flags
    AC_LANG_POP()
])
AM_CONDITIONAL([HAS_FUZZLDFLAGS], [test "x$has_sanitizefuzzer" = "xyes"])

AC_CHECK_LIB(pthread, pthread_setaffinity_np, AC_DEFINE_UNQUOTED(HAVE_PTHREAD_SETAFFINITY_NP, 1, [libc has pthread_setaffinity_np]))

dnl> PCRE
AC_ARG_WITH(pcre,          [  --with-pcre        Enable nDPI build with libpcre])
if test "${with_pcre+set}" = set; then :
  AC_CHECK_LIB(pcre, pcre_compile, AC_DEFINE_UNQUOTED(HAVE_PCRE, 1, [libpcre(-dev) is present]))
  if test "x$ac_cv_lib_pcre_pcre_compile" = xyes; then :
    ADDITIONAL_LIBS=-lpcre
  fi
fi

AC_CONFIG_FILES([Makefile example/Makefile example/Makefile.dpdk tests/Makefile libndpi.pc src/include/ndpi_define.h src/lib/Makefile python/Makefile fuzz/Makefile])
AC_CONFIG_HEADERS(src/include/ndpi_config.h)
AC_SUBST(GIT_RELEASE)
AC_SUBST(NDPI_MAJOR)
AC_SUBST(NDPI_MINOR)
AC_SUBST(NDPI_PATCH)
AC_SUBST(NDPI_VERSION_SHORT)
AC_SUBST(SVN_DATE)
AC_SUBST(JSON_C_LIB)
AC_SUBST(PCAP_INC)
AC_SUBST(PCAP_LIB)
AC_SUBST(ADDITIONAL_LIBS)
AC_SUBST(DL_LIB)
AC_SUBST(DPDK_TARGET)
AC_SUBST(HAVE_PTHREAD_SETAFFINITY_NP)
AC_SUBST(CUSTOM_NDPI)
AC_OUTPUT